JPH04218134A - Tip of endoscope - Google Patents

Abstract

PURPOSE:To enable the protruding of a treating device or the like smoothly without hitching by forming a wall in contact with an external side of a treating device erecting base at a tip part body to a position along a part near an manipulating wire from a shaft position while a stopper is formed separately from the wall part. CONSTITUTION:A wall part C in contact with an external surface of a treating device erecting base 3 is formed at a metal frame part 1a of a tip part body without clearance near a manipulating wire 8 from the position of a shaft 4. A rim part thereof is arranged to give a slight clearance between the part and the manipulating wire 8 and formed along the manipulating wire 8. To regulate a range of rotating the treating device erecting base 3, a stopper 12 provided on the side of a metal frame part 1a is formed on a wall part 1d in contact with an internal surface of the treating device erecting base 3. When the manipulating wire is tensioned, an internal upper end part of the processing device erecting base 3 hits the stopper 12 on a stage and with the manipulating wire 8 being pushed out, the bottom of the treating device erecting base 3 hits a stopper pin 13.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a distal end of an endoscope having a treatment instrument raising table for changing the direction of protrusion of treatment instruments projecting outward from the distal end body.

0002

2. Description of the Related Art FIG. 4 shows the distal end of a conventional endoscope.

[0003] The treatment instrument raising table 51 is rotatably provided within the distal end body 52 of the endoscope about a shaft 53 . 52a is a metal frame portion of the tip body. 52b is a plastic cover part.

FIG. 5 shows the plastic cover portion 52b omitted. As shown in FIGS. 5 and 4, a manipulation wire 55 whose tip end is connected to a treatment instrument raising table 51
extends rearward from the outer side of the treatment instrument raising table 51, and by remotely moving the operation wire 55 forward and backward, the treatment instrument raising table 51 is rotated about the shaft 53.

A pin 56 is provided protruding from the outer surface of the treatment instrument raising table 51, and a wall portion formed on the metal frame portion 52a of the distal end body is in contact with the outer surface of the treatment instrument raising table 51. 57 is cut out in the shape of a step, and the cutout portion serves as stopper surfaces 58 and 59 against which the pin 56 for regulating the rotation range of the treatment instrument raising table 51 collides.

[0006]

As described above, in the distal end of the conventional endoscope, the wall portion 57 in contact with the outer surface of the treatment instrument raising table 51 forms the stopper surfaces 58 and 59. , was notched below the operating wire 55, and a relatively large gap was formed between the operating wire 55 and the operating wire 55.

[0007] Therefore, for example, as shown in FIG.
When attempting to project the treatment instrument 100 outward from the treatment instrument insertion channel 50 through the treatment instrument raising table 51, the tip of the treatment instrument 100 enters the gap between the operating wire 55 and the wall portion 57. There were cases where the device got caught in the operating wire 55 and became inoperable.

[0008] An object of the present invention is to eliminate such conventional drawbacks and to provide a distal end portion of an endoscope that allows treatment instruments to be smoothly projected without getting caught.

[0009]

[Means for Solving the Problems] In order to achieve the above object, the distal end portion of the endoscope of the present invention has the above-mentioned features for changing the protruding direction of the treatment instruments that protrude outward from the distal end body. A treatment instrument elevator is provided on the distal end main body so as to be rotatable around an axis, and the tip is connected to the treatment instrument elevator in order to rotate the treatment instrument elevator. In the distal end of the endoscope, which has an operation wire extending rearward from the outer part and a stopper formed on the distal end main body to restrict the rotation range of the treatment instrument elevator, the axial position A wall portion that contacts the outer surface of the treatment instrument raising table from 1 to a position along the vicinity of the operating wire is formed on the tip body, and the stopper is formed separately from the wall portion. .

0010

[Embodiment] An embodiment will be described with reference to the drawings.

FIG. 2 shows the vicinity of the distal end main body 1 provided at the distal end of the insertion section 20 of the endoscope, which is made of an elongated flexible tube. The tip main body 1 is formed by covering a metal frame portion 1a with a plastic cover portion 1b.

Reference numeral 2 denotes a treatment instrument insertion channel that is inserted over its entire length into the insertion portion 20, and its open end is connected to the rear end of the metal frame portion 1a of the tip body 1.

FIG. 1 is a perspective view with the plastic cover portion 1b omitted, and as shown in FIGS. It is rotatably supported around a shaft 4.

The elevator housing chamber 5 that accommodates the treatment instrument elevator 3 is arranged to open outwardly, along with the observation window 6 and the illumination window 7. Through the chamber 5, treatment instruments can be projected outward.

The tip of an operating wire 8 is inserted into the treatment instrument raising table 3 from the side and is rotatably connected thereto. The operating wire 8 extends rearward along the outer side of the treatment instrument raising table 3 and is inserted into a guide tube 10 that is inserted over its entire length into the insertion section 20 so as to be freely advanced and retracted.

Therefore, by moving the operating wire 8 forward and backward from the base end side (not shown), the treatment instrument raising table 3 rotates about the shaft 4 and projects outward from the distal end main body 1. The protruding direction of the treatment instruments can be changed. The treatment instrument raising table 3 in the raised state is indicated by a two-dot chain line.

A wall portion 1c in contact with the outer surface of the treatment instrument elevator 3 is formed in the metal frame portion 1a of the distal end main body without any gap from the position of the shaft 4 to the vicinity of the operating wire 8.
The edge of the wall portion 1c is formed along the operating wire 8 so that there is only a small gap between the edge and the operating wire 8.

Stoppers 12, 1 are provided on the metal frame portion 1a side to restrict the rotation range of the treatment instrument raising table 3.
3 is formed on the wall portion 1d that is in contact with the inner surface (the side surface to which the operating wire 8 is not attached) of the treatment instrument raising table 3.

That is, as shown in FIG. 1, when the operating wire 8 is pulled, the treatment instrument raising table 3 is raised and its inner upper end portion is connected to the step-shaped step formed directly on the metal frame portion 1a. When it hits the stopper 12 and the operating wire 8 is pushed out, the treatment instrument elevator 3 is returned and its bottom hits the stopper pin 13 protruding from the metal frame portion 1a.

At the distal end of the endoscope of this embodiment formed as described above, only an extremely small gap exists between the operating wire 8 and the wall portion 1c.

Therefore, when attempting to project the treatment instrument 100 outward from the treatment instrument insertion channel 2 through the treatment instrument raising table 3, as shown in FIG. It does not get stuck in the gap below the 8, and is smoothly projected outward.

[0022]

[Effects of the Invention] According to the distal end portion of the endoscope of the present invention, the wall portion in contact with the outer surface of the treatment instrument elevator is formed to a position along the vicinity of the operation wire, and this wall portion forms a stopper. Since there are no notches, the gap between the operation wire and the wall can be made small enough to prevent the treatment instruments from getting caught, making it an excellent device that allows the treatment instruments to always be protruded and operated smoothly. have an effect.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an embodiment.

FIG. 2 is a side sectional view of the embodiment.

FIG. 3 is a perspective view of the embodiment.

FIG. 4 is a side sectional view of a conventional example.

FIG. 5 is a perspective view of a conventional example.

FIG. 6 is a perspective view of a conventional example.

[Explanation of symbols]

1 Tip body 1a Metal frame part 1c Wall part 3　Treatment instrument lifting platform 4 axis 8 Operation wire 12 Stopper 13 Stopper pin 100 Treatment equipment

Claims (1)

[Claims] 1. A treatment instrument raising stand rotatably provided on the distal end body about an axis in order to change the protruding direction of the treatment instruments protruding outward from the distal end body; and the treatment instrument. In order to rotate the treatment instrument elevator, an operation wire whose tip end is connected to the treatment instrument elevator and extends rearward from the outer side of the treatment instrument elevator and a rotation range of the treatment instrument elevator is connected. In the distal end of the endoscope, which has a stopper formed on the distal end main body for regulating the distal end, a wall portion in contact with the outer surface of the treatment instrument elevator is extended from the axial position to a position along the vicinity of the operating wire. The stopper is formed on the tip main body,
A distal end portion of an endoscope, characterized in that the distal end portion is formed separately from the wall portion.